Transverse beam polarization and CP violation in e+ e- -> gamma Z with contact interactions

Abstract

We consider the most general gauge-invariant, chirality-conserving contact interactions in the process e +e- -> gamma Z, of the type proposed Abraham and Lampe, in order to explore the possibility of CP violation at future linear colliders in the presence of polarized beams. We hereby extend recent work on CP violation due to anomalous triple-gauge boson vertices. We isolate combinations of couplings which are genuinely CP violating, pointing out which of these can only be studied with the use of transverse polarization. We place constraints on these couplings that could arise from suitably defined CP-odd asymmetries, considering realistic polarization (either longitudinal or transverse) of 80% and 60% for the electron and positron beams respectively, and with an integrated luminosity \int dt L of 500 fb^{-1} at a centre of mass energy of \sqrt{s}=500 GeV.

13 pages latex with 2 figures, replaced with version accepted by Physics Letters B for publication. Now includes full discussion on longitudinal polarization

References in corpus (6)

• Transverse beam polarization and CP-violating triple-gauge-boson couplings in e+e- -> gamma Z
• CP violation at a linear collider with transverse polarization
• More Transverse Polarization Signatures of Extra Dimensions at Linear Colliders
• Single decay-lepton angular distributions in polarized e+e- --> t tbar and simple angular asymmetries as a measure of CP-violating top dipole couplings
• Transverse beam polarization and limits on leptoquark couplings in e+e- --> t tbar
• CP Violation in the 3 Jet and 4 Jet Decays of the Z Boson at GigaZ

Cited by in corpus (18)

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• New Physics in $e^{+}{e}^{-}\to Z\gamma$ at the ILC with polarized beams: Explorations beyond conventional anomalous triple gauge boson coupling
• Disentangling the Unparticles with polarized beams at e+e- colliders
• New physics in e+ e- -> Z gamma with polarized beams
• Selectron production at an e-e- linear collider with transversely polarized beams
• Isolating CP-violating γZZ coupling in e+e- \to γZ with transverse beam polarizations
• Charged lepton distributions as a probe of contact e+e-HZ interactions at a linear collider with polarized beams
• Space-time structure of new physics with polarized beams at the linear collider
• Two-particle kinematic distributions from new physics at an electron-positron collider with polarized beams
• Top-spin analysis of new scalar and tensor interactions in e^+ e^- collisions with beam polarization
• Use of Transverse polarization to probe R-parity violating supersymmetry at ILC
• How to measure the spin of invisible states in $e^{+}{e}^{-}\to \gamma +X$
• Distinguishing nonstandard scalar and fermionic charged particles at future $e^{+}{e}^{-}$ collider
• Probing space-time structure of new physics with polarized beams at the ILC